Export of internal Abseil changes.

--
fcf9d3facb12451964ad1850073cbfb6f9739379 by CJ Johnson <[email protected]>:

Makes it obvious to readers that the comparison operators do not branch more than needed

PiperOrigin-RevId: 240811527

--
680c586f81f805be68e96caffb28d5f46b6a6511 by Jon Cohen <[email protected]>:

Consistently use "if(" instead of "if (" in CMake files

PiperOrigin-RevId: 240621819

--
c4acc506648622389f33f564fd94f8dda08cb61a by Tom Manshreck <[email protected]>:

Internal change

PiperOrigin-RevId: 240619556

--
ddbc1894944aae96767c876a1ae8696ddaba42a2 by Jon Cohen <[email protected]>:

Remove the warning about install prefixes when we aren't installing abseil

PiperOrigin-RevId: 240614750

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086c4fad213d99e875038bc8a1c7268e28a7ebf3 by Abseil Team <[email protected]>:

Adjust some tests and test cases which fail on WebAssembly

PiperOrigin-RevId: 240592367

--
46c2c09723a37ef4911ae3c64aab92e3f0fdba79 by Abseil Team <[email protected]>:

CMake install target update
- Add prefix absl_ to each target when install rule are disabled.
- Disable all install commands when absl is used as subdirectory (Fix abseil#287)

PiperOrigin-RevId: 240575083

--
8d88063ed5b16f982a91950693d37ca18fdd46d8 by Jon Cohen <[email protected]>:

Correctly link to Threads::Threads for a few cmake targets which were missing it.

PiperOrigin-RevId: 240574513
GitOrigin-RevId: fcf9d3facb12451964ad1850073cbfb6f9739379
Change-Id: I031c57de8cd88554348eb8bd1371d01d15ff1fc7

CMake/AbseilHelpers.cmake

@@ -59,7 +59,7 @@ set(ABSL_IDE_FOLDER Abseil)
 #   SRCS
 #     "b.cc"
 #   DEPS
-#     absl_internal_awesome # not "awesome"!
+#     absl::awesome # not "awesome" !
 #   PUBLIC
 # )
 #
@@ -68,7 +68,7 @@ set(ABSL_IDE_FOLDER Abseil)
 #     main_lib
 #   ...
 #   DEPS
-#     absl::fantastic_lib # since fantastic_lib is public
+#     absl::fantastic_lib
 # )
 #
 # TODO: Implement "ALWAYSLINK"
@@ -80,8 +80,12 @@ function(absl_cc_library)
     ${ARGN}
   )
 
-  if (NOT ABSL_CC_LIB_TESTONLY OR ABSL_RUN_TESTS)
-    set(_NAME "${ABSL_CC_LIB_NAME}")
+  if(NOT ABSL_CC_LIB_TESTONLY OR ABSL_RUN_TESTS)
+    if(ABSL_ENABLE_INSTALL)
+      set(_NAME "${ABSL_CC_LIB_NAME}")
+    else()
+      set(_NAME "absl_${ABSL_CC_LIB_NAME}")
+    endif()
 
     # Check if this is a header-only library
     # Note that as of February 2019, many popular OS's (for example, Ubuntu
@@ -93,7 +97,7 @@ function(absl_cc_library)
         list(REMOVE_ITEM ABSL_CC_SRCS "${src_file}")
       endif()
     endforeach()
-    if ("${ABSL_CC_SRCS}" STREQUAL "")
+    if("${ABSL_CC_SRCS}" STREQUAL "")
       set(ABSL_CC_LIB_IS_INTERFACE 1)
     else()
       set(ABSL_CC_LIB_IS_INTERFACE 0)
@@ -155,7 +159,7 @@ function(absl_cc_library)
 
     # TODO currently we don't install googletest alongside abseil sources, so
     # installed abseil can't be tested.
-    if (NOT ABSL_CC_LIB_TESTONLY)
+    if(NOT ABSL_CC_LIB_TESTONLY AND ABSL_ENABLE_INSTALL)
       install(TARGETS ${_NAME} EXPORT ${PROJECT_NAME}Targets
             RUNTIME DESTINATION ${ABSL_INSTALL_BINDIR}
             LIBRARY DESTINATION ${ABSL_INSTALL_LIBDIR}

CMake/AbseilInstallDirs.cmake

@@ -6,7 +6,7 @@ include(GNUInstallDirs)
 # Abseil's internal Copybara (https://github.com/google/copybara) workflows and
 # isn't visible in the CMake buildsystem itself.
 
-if (absl_VERSION)
+if(absl_VERSION)
   set(ABSL_SUBDIR "${PROJECT_NAME}_${PROJECT_VERSION}")
   set(ABSL_INSTALL_BINDIR "${CMAKE_INSTALL_BINDIR}/${ABSL_SUBDIR}")
   set(ABSL_INSTALL_CONFIGDIR "${CMAKE_INSTALL_LIBDIR}/cmake/${ABSL_SUBDIR}")

CMake/abslConfig.cmake.in

@@ -1,5 +1,6 @@
-## absl CMake configuration file.  Note that there is no corresponding
-# abslConfigVersion.cmake since non-LTS Abseil isn't versioned.
+# absl CMake configuration file.
+
+include(FindThreads)
 
 @PACKAGE_INIT@
 

CMakeLists.txt

@@ -86,18 +86,6 @@ if(${ABSL_RUN_TESTS})
   enable_testing()
 endif()
 
-# absl:lts-remove-begin(system installation is supported for LTS releases)
-# We don't support system-wide installation
-list(APPEND SYSTEM_INSTALL_DIRS "/usr/local" "/usr" "/opt/" "/opt/local" "c:/Program Files/${PROJECT_NAME}")
-if(NOT DEFINED CMAKE_INSTALL_PREFIX OR CMAKE_INSTALL_PREFIX IN_LIST SYSTEM_INSTALL_DIRS)
-  message(WARNING "\
-The default and system-level install directories are unsupported except in LTS \
-releases of Abseil.  Please set CMAKE_INSTALL_PREFIX to install Abseil in your \
-source or build tree directly.\
-  ")
-endif()
-# absl:lts-remove-end
-
 ## check targets
 if(BUILD_TESTING)
 
@@ -121,7 +109,19 @@ endif()
 
 add_subdirectory(absl)
 
-if (ABSL_ENABLE_INSTALL)
+if(ABSL_ENABLE_INSTALL)
+  # absl:lts-remove-begin(system installation is supported for LTS releases)
+  # We don't support system-wide installation
+  list(APPEND SYSTEM_INSTALL_DIRS "/usr/local" "/usr" "/opt/" "/opt/local" "c:/Program Files/${PROJECT_NAME}")
+  if(NOT DEFINED CMAKE_INSTALL_PREFIX OR CMAKE_INSTALL_PREFIX IN_LIST SYSTEM_INSTALL_DIRS)
+    message(WARNING "\
+  The default and system-level install directories are unsupported except in LTS \
+  releases of Abseil.  Please set CMAKE_INSTALL_PREFIX to install Abseil in your \
+  source or build tree directly.\
+    ")
+  endif()
+  # absl:lts-remove-end
+
   # install as a subdirectory only
   install(EXPORT ${PROJECT_NAME}Targets
     NAMESPACE absl::
@@ -140,7 +140,7 @@ if (ABSL_ENABLE_INSTALL)
   # Abseil only has a version in LTS releases.  This mechanism is accomplished
   # Abseil's internal Copybara (https://github.com/google/copybara) workflows and
   # isn't visible in the CMake buildsystem itself.
-  if (absl_VERSION)
+  if(absl_VERSION)
     write_basic_package_version_file(
       "${PROJECT_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake"
       COMPATIBILITY ExactVersion

absl/base/CMakeLists.txt

@@ -88,6 +88,7 @@ absl_cc_library(
     absl::core_headers
     absl::dynamic_annotations
     absl::spinlock_wait
+    Threads::Threads
 )
 
 absl_cc_library(
@@ -134,6 +135,7 @@ absl_cc_library(
     absl::core_headers
     absl::dynamic_annotations
     absl::spinlock_wait
+    Threads::Threads
   PUBLIC
 )
 
@@ -438,3 +440,12 @@ absl_cc_test(
     absl::scoped_set_env
     gtest_main
 )
+
+absl_cc_test(
+  NAME
+    cmake_thread_test
+  SRCS
+    "internal/cmake_thread_test.cc"
+  DEPS
+    absl::base
+)

absl/base/internal/cmake_thread_test.cc

@@ -0,0 +1,22 @@
+// Copyright 2018 The Abseil Authors.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//      https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <iostream>
+#include "absl/base/internal/thread_identity.h"
+
+int main() {
+  auto* tid = absl::base_internal::CurrentThreadIdentityIfPresent();
+  // Make sure the above call can't be optimized out
+  std::cout << (void*)tid << std::endl;
+}

absl/container/inlined_vector.h

@@ -847,7 +847,7 @@ class InlinedVector {
 
  private:
   template <typename H, typename TheT, size_t TheN, typename TheA>
-  friend auto AbslHashValue(H h, const InlinedVector<TheT, TheN, TheA>& v) -> H;
+  friend H AbslHashValue(H h, const absl::InlinedVector<TheT, TheN, TheA>& a);
 
   const Tag& tag() const { return storage_.allocator_and_tag_.tag(); }
 
@@ -1231,26 +1231,30 @@ class InlinedVector {
 // Swaps the contents of two inlined vectors. This convenience function
 // simply calls `InlinedVector::swap()`.
 template <typename T, size_t N, typename A>
-auto swap(InlinedVector<T, N, A>& a,
-          InlinedVector<T, N, A>& b) noexcept(noexcept(a.swap(b))) -> void {
+void swap(absl::InlinedVector<T, N, A>& a,
+          absl::InlinedVector<T, N, A>& b) noexcept(noexcept(a.swap(b))) {
   a.swap(b);
 }
 
 // `operator==()`
 //
 // Tests the equivalency of the contents of two inlined vectors.
 template <typename T, size_t N, typename A>
-auto operator==(const InlinedVector<T, N, A>& a,
-                const InlinedVector<T, N, A>& b) -> bool {
-  return absl::equal(a.begin(), a.end(), b.begin(), b.end());
+bool operator==(const absl::InlinedVector<T, N, A>& a,
+                const absl::InlinedVector<T, N, A>& b) {
+  auto a_data = a.data();
+  auto a_size = a.size();
+  auto b_data = b.data();
+  auto b_size = b.size();
+  return absl::equal(a_data, a_data + a_size, b_data, b_data + b_size);
 }
 
 // `operator!=()`
 //
 // Tests the inequality of the contents of two inlined vectors.
 template <typename T, size_t N, typename A>
-auto operator!=(const InlinedVector<T, N, A>& a,
-                const InlinedVector<T, N, A>& b) -> bool {
+bool operator!=(const absl::InlinedVector<T, N, A>& a,
+                const absl::InlinedVector<T, N, A>& b) {
   return !(a == b);
 }
 
@@ -1259,18 +1263,23 @@ auto operator!=(const InlinedVector<T, N, A>& a,
 // Tests whether the contents of one inlined vector are less than the contents
 // of another through a lexicographical comparison operation.
 template <typename T, size_t N, typename A>
-auto operator<(const InlinedVector<T, N, A>& a, const InlinedVector<T, N, A>& b)
-    -> bool {
-  return std::lexicographical_compare(a.begin(), a.end(), b.begin(), b.end());
+bool operator<(const absl::InlinedVector<T, N, A>& a,
+               const absl::InlinedVector<T, N, A>& b) {
+  auto a_data = a.data();
+  auto a_size = a.size();
+  auto b_data = b.data();
+  auto b_size = b.size();
+  return std::lexicographical_compare(a_data, a_data + a_size, b_data,
+                                      b_data + b_size);
 }
 
 // `operator>()`
 //
 // Tests whether the contents of one inlined vector are greater than the
 // contents of another through a lexicographical comparison operation.
 template <typename T, size_t N, typename A>
-auto operator>(const InlinedVector<T, N, A>& a, const InlinedVector<T, N, A>& b)
-    -> bool {
+bool operator>(const absl::InlinedVector<T, N, A>& a,
+               const absl::InlinedVector<T, N, A>& b) {
   return b < a;
 }
 
@@ -1279,8 +1288,8 @@ auto operator>(const InlinedVector<T, N, A>& a, const InlinedVector<T, N, A>& b)
 // Tests whether the contents of one inlined vector are less than or equal to
 // the contents of another through a lexicographical comparison operation.
 template <typename T, size_t N, typename A>
-auto operator<=(const InlinedVector<T, N, A>& a,
-                const InlinedVector<T, N, A>& b) -> bool {
+bool operator<=(const absl::InlinedVector<T, N, A>& a,
+                const absl::InlinedVector<T, N, A>& b) {
   return !(b < a);
 }
 
@@ -1289,8 +1298,8 @@ auto operator<=(const InlinedVector<T, N, A>& a,
 // Tests whether the contents of one inlined vector are greater than or equal to
 // the contents of another through a lexicographical comparison operation.
 template <typename T, size_t N, typename A>
-auto operator>=(const InlinedVector<T, N, A>& a,
-                const InlinedVector<T, N, A>& b) -> bool {
+bool operator>=(const absl::InlinedVector<T, N, A>& a,
+                const absl::InlinedVector<T, N, A>& b) {
   return !(a < b);
 }
 
@@ -1299,11 +1308,13 @@ auto operator>=(const InlinedVector<T, N, A>& a,
 // Provides `absl::Hash` support for inlined vectors. You do not normally call
 // this function directly.
 template <typename H, typename TheT, size_t TheN, typename TheA>
-auto AbslHashValue(H h, const InlinedVector<TheT, TheN, TheA>& v) -> H {
-  auto p = v.data();
-  auto n = v.size();
-  return H::combine(H::combine_contiguous(std::move(h), p, n), n);
+H AbslHashValue(H h, const absl::InlinedVector<TheT, TheN, TheA>& a) {
+  auto a_data = a.data();
+  auto a_size = a.size();
+  return H::combine(H::combine_contiguous(std::move(h), a_data, a_size),
+                    a_size);
 }
+
 }  // namespace absl
 
 #endif  // ABSL_CONTAINER_INLINED_VECTOR_H_

absl/container/internal/raw_hash_set_test.cc

@@ -414,10 +414,10 @@ TEST(Table, Prefetch) {
   t.prefetch(2);
 
   // Do not run in debug mode, when prefetch is not implemented, or when
-  // sanitizers are enabled.
+  // sanitizers are enabled, or on WebAssembly.
 #if defined(NDEBUG) && defined(__GNUC__) && !defined(ADDRESS_SANITIZER) && \
     !defined(MEMORY_SANITIZER) && !defined(THREAD_SANITIZER) &&            \
-    !defined(UNDEFINED_BEHAVIOR_SANITIZER)
+    !defined(UNDEFINED_BEHAVIOR_SANITIZER) && !defined(__EMSCRIPTEN__)
   const auto now = [] { return absl::base_internal::CycleClock::Now(); };
 
   // Make size enough to not fit in L2 cache (16.7 Mb)

absl/copts/AbseilConfigureCopts.cmake

@@ -5,13 +5,13 @@ set(ABSL_LSAN_LINKOPTS "")
 set(ABSL_HAVE_LSAN OFF)
 set(ABSL_DEFAULT_LINKOPTS "")
 
-if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
   set(ABSL_DEFAULT_COPTS "${ABSL_GCC_FLAGS}")
   set(ABSL_TEST_COPTS "${ABSL_GCC_FLAGS};${ABSL_GCC_TEST_FLAGS}")
   set(ABSL_EXCEPTIONS_FLAG "${ABSL_GCC_EXCEPTIONS_FLAGS}")
 elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
   # MATCHES so we get both Clang and AppleClang
-  if (MSVC)
+  if(MSVC)
     # clang-cl is half MSVC, half LLVM
     set(ABSL_DEFAULT_COPTS "${ABSL_CLANG_CL_FLAGS}")
     set(ABSL_TEST_COPTS "${ABSL_CLANG_CL_FLAGS};${ABSL_CLANG_CL_TEST_FLAGS}")
@@ -21,7 +21,7 @@ elseif("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
     set(ABSL_TEST_COPTS "${ABSL_LLVM_FLAGS};${ABSL_LLVM_TEST_FLAGS}")
     set(ABSL_EXCEPTIONS_FLAG "${ABSL_LLVM_EXCEPTIONS_FLAGS}")
     set(ABSL_DEFAULT_LINKOPTS "${ABSL_MSVC_LINKOPTS}")
-    if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
+    if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
       # AppleClang doesn't have lsan
       # https://developer.apple.com/documentation/code_diagnostics
       if(CMAKE_CXX_COMPILER_VERSION VERSION_GREATER_EQUAL 3.5)

absl/synchronization/CMakeLists.txt

@@ -64,6 +64,7 @@ absl_cc_library(
     absl::stacktrace
     absl::symbolize
     absl::time
+    Threads::Threads
   PUBLIC
 )
 
@@ -191,5 +192,4 @@ absl_cc_test(
     absl::synchronization
     absl::base
     absl::core_headers
-    Threads::Threads
 )

absl/types/BUILD.bazel

@@ -117,7 +117,12 @@ cc_test(
 
 cc_library(
     name = "span",
-    hdrs = ["span.h"],
+    srcs = [
+        "internal/span.h",
+    ],
+    hdrs = [
+        "span.h",
+    ],
     copts = ABSL_DEFAULT_COPTS,
     linkopts = ABSL_DEFAULT_LINKOPTS,
     deps = [

absl/types/CMakeLists.txt

@@ -114,6 +114,8 @@ absl_cc_library(
     span
   HDRS
     "span.h"
+  SRCS
+    "internal/span.h"
   COPTS
     ${ABSL_DEFAULT_COPTS}
   DEPS